Boiler and furnace



Nov. 25, 1930. c. w. sTANcLlFFE BOILER AND FURNACE Filed April 13. 192e2. Sheets-Sheet l Arron/Ely `Patented Nov.`

\ AoiazcIIi WHEATLEYVSTANCLIFF, or: LnwYcn, LonnonffENGLAivpi f" "nominaAND summon? i Application inea Aprilia, 1928, Seria; No. 259,359,V` andin" (1a-ea@BritainV April 22`,`"`1`92`7L" `"'Ihisinvention relates tocontrol apparatus "for boilers and furnaces, and has for' its principalobject to provide an improved apparatus which will avoid'theuncertainties at` f ymechanical means in accordance with the vall() p pg i 'physical quantity of the boiler vor furnace.

tendant upon lelectrofmagnetic means pre- `viously,proposed and willenable the supply `offuel 'air exhaust gasesor other similar quantitiesto be controlled automatically by riation of steam p'ressurefor other ivariable `The invention is fparticula'rly applicable,

though not restrictedto controlling thesupply-of fue'land air to 'aboilerandit is to be Y understoodr that wherever I' refer in thisspeciiicationto the fuel control means I mean tocover thecaseofsolidorliquid.fuelsup- H s ply, 0,1" @if Supp f which is a function of thesteam pressure or other variable physical quantity of the boilerprovide` a controlV apparatus comprising a -which increases in apredetermined.manner "lso that lthe position of the plunger depends" lyorboth fuel and airfs'upplytogether.yY` -V g l `A further object of4thelinventionj is `to plunger which Vis `subjected toa pressure orfurnace,"and moves against a `resistance upon the boiler pressure orotherV controlling quantity, and the movement of the plunger` iscommunicated by improvedindependently driven mechanical means to thesupply con- @adjusted ataj stage -ofits movement l.without affecting themovement allowed to thevcontrol `device for anzequalwmovement of" themain V` trol meansatonefor more stations.

A further object Vofthe invention is to protrolv member moves. by yamounts which are control* deviceV correspondingj to" a given-7 movementof the main control `memberto be `controlmember vat other stages of itsmovej A *A further object istoprovi'deat .theffuelv control; stationsmeansrfor` imposing `an adffrfem; the lplungen fp n Justinentqupon themovement transmittedi` jmentary damper control apparatus l from fthe,main control plunger.` i i x- 5:1

1 lllhe plunger carriesa weight E Eat its upp {Lactsas a-relay.

With these andother objects in View thev invention consists in the novelarrangements and i combinations f-hereinaftper described in detail,thenovel features whereof are set out in the appended claims. y the,accompanying draw lustrate the invention in a diagrammatic kmanner, f i

`Figlreprese form of main control plungerapparatusfthe -positionoftheplungerof which isautomatif Y lied by the steam pressure in the p lntsin elevation the preferred cally contro .b oileri'g llTig. Q'repr lesents elevation -the suppleoperated u.

Figa `3 represents inelevation the ings which iimentary fuel; feedcontrol apparatus oper-` `ated from themaincontrol plunger.

, `:Referriuig first,` tofFig` 1- of the drawings oil which communicateswithjachamberC i i nected by a pipe D to the boileryafv 1 `end `which`is guided between frame `members ag.- Upon ledges b on thisframe arevmounteda having `water atthe'bottom and oil on the` topythe` lowerparti of `this chamber is con-y y Y `'I5 er series of loose weights E,which maybe of f equal or ivaryingweight Vand may be at equal`Oruneolual distances apart., When thejdiiference offpressure-on thetwosides of thepiston 'A'-depending upon the steam pressurein theboiler-exceeds theV total weight i of plunger y .and weight E, theplunger rises `until it en-` Y resting onits `appropriate `ledge Lwillbe able to pass-freelyabovethe Vupper ledges. i Y The position oftheplunger controls the po- -f vsition` ofa controlfc'able Gr and thiscable is carried ashaft H driven byV anfndependentx motor so that "thepiston needinot be ablelto` have suliicientpower to operate the `cable"V'1o` a plungerfA works in a cylinder BVfull of.y n l soV Above andbelow the worm wheel J 3pin-V ions J t, J5 of equal diameter arecarried. rlhese pinions are adapted alternatively to engage pinions H,H5 carried by bevel pinions H5, H7 each of which engage a bevel pinionH3; these bevel pinions form a crown bevel train and are carried in abracket H2 which slides on a guide rod K and through which the shaft Hpasses. The pinion H5 is keyed or splined to the shaft H and the pinionH7 is loose Jthereon and the upper portion of the shaft is screwthreaded and passes through a. nut L and is connected to the cable G bya swivel H1. Y

Now suppose that the plunger rises; the pinion J 1 will then engage thepinion H4 and the shaft H will thus rotate and due to the engagementwith the nut L will rise also. rlhe shaft H will stop rotation whenthe'plunger stops because the pinion H4 will then rise clear of thepinion J 4.

- If the plunger falls, the pinion J5 Will move into engagement with thepinion H5 and through the loose bevel pinions H5,l H3 will drive thebevel pinion H5 in the reverse direction thus causing the shaft H tofall; when i the pinion ceases to fall the shaft H will stop because thepinion H5 will pass out of engagement with the pinion J5.

The plunger thus acts as a relay governing the position of the shaft Hand thus of the control cable G. f

v The main control cable Gr is connected in any suitable manner with anumber of supplementary control stations. The main cable -may forinstance be connected to a shaft upon .which are carried a number ofsupplementary control cables which will move in unison with the mamcontrol cable, and by employing pulleys of varying' sizes the motion maybe geared up or down.

It is desirable that at each supplementary control station we may have acontrol apparat-us which may be adjusted independently of the othercontrols. 'l`his is effected by con- .rnecting the supplementary controlcable M,

Fig. 2, to a series of weights Q, in number equal to those of the maincontrol apparatus and at the same distance apart if the cable M moves atthe same speed as the main cable Gr, and at corresponding distancesapart if the cable motion is geared up or down.

The weights are connected by chains e and are suspended by chains l froma fixed bracket O the cable M passes through this bracket and throughthe Weights and is connected at the end to an abutment m which-isadapted to engage under the lowermost weight Q and to lift it. Vhen thecable has moved sufficiently the other weights Q will be picked up inturn. The weights Q are connected by cables R1, R2, R3, R4 to acounterweighted lever S attached to the damper l) of a flue T.

The length of each of these chains lll-R4 can be adjusted so that theposition. of the Idamper corresponding to any given over pressure ofsteam may be varied due to particular circumstances such as iue gasanalysis; any convenient adjustment means may be employed for the lengthof chain.

VIn the position shown on the drawings the damper is full open, thelowest .veight Q is about to be lifted and the chain R4 is taut; thelength of the chain R4 however ce.; be adjusted independently of themain control apparatus and thus the position of the damper varied. y

When the abutment m rises to `bring the two lowest weights Q, in contactthe chain RL will have become slack and the damper will be controlled bythe cable Rg which will then be slack, and so on for other positions.

rlhe apparatus illustrated in Fig. of the drawings for the fuel controlis similar in all respects with that previously described except thatthe chains l-Ri are connected to a drum ll connected to a rheostat leverV by a cable u passing over a pulley c and carrying a counterweight lV.Each rheostat governs Vthe speed of a motor or other device whichdetermines the rate of` fuel to each boiler, and thus each rheostat canby means of the chains have any desired adjustment imposed upon thatgiven by the main control apparatus.

It is to be understood that the invention is not restricted to the exactdetails shown and described but embraces such modifications as comewithin the ambit of the accompanying claims.

A I claim l. Apparatus for controlling boilers and furnaces comprising aplunger subjected to a pressure which is a function of the steampressure or other controlling quantity, a series of weightsat spacedintervalseach normally resting against abutments, means for causing saidweights successively to resist the movement of said plunger, a powerdriven shaft, a supplementary shaft having gearing `connection with saidshaft, means for throw- "45 v ice for one step of the `movement of thegiven movementof the main control member incassa two parallel pinions onsaid transmission shaft slightly farther apart than thewsaid powerdriven'pinions and adapted to engage therewith one ata time, onevof saidpinions beingifreeon said transmission shaft and the other beingsplinedthereto, bevel wheels connecting said pinions, means for causingsaid transmission shaftuto move axially and m` n out `of engagement withthe power driven n meansfor'cau'sing said pini-ons carried thereby'tomove` with the shaft and thus to move pinion when axial movement of thelatter ceasesi i t i 3. lApparatus for controlling boilers and furnacescomprisingV a main control' meinber moved by distances which arevfunctions n of tliesteam pressure or] other controlling mquantity, asecondary control `means v comprising a series of weights` successivelylbrought into operation by successiveV stepped n. movements of the maincontrol member, a supply control-device, and `a flexible memberofvariab'le length connecting each weight to the supplycontrol device.

V4. Apparatus `for controlling `boilers and furnaces,` comprising incombination acontrol means which moves by distances which ,are functionsof boiler pressure or other boiler condition, a supply controldevice,and a pluralityof flexible members connecting tlie supply controldevice to the control means and successiv-elycoming into operation asthe control means moves into successive positions.

`5. Apparatus for controlling boilers and furnaces comprising incombination armechanically operated control `means `which lmoves bydistances which are functions of boiler pressure or otherboilercondition, a

supply control device, a series of independent mechanical connectorscontrolling the `inovement of the supplycontrol device atsuccessivesteps of the movement of the controllV means, and mechanicalmeans for varyingV the movement of the supplycontrol denaces in which amain control member which is `caused vto move by amounts which arefunctions ofthe steam pressure or other n boiler condition communicatesits movement to a series of weights `suspended from a fixed support oneabove the other and con-l nectedto each other by chains or cables,

vsaid weights being connected to a `supply fcontroldevice.y i

t 8. Apparatus for controlling boilers!- and furnaces in which a main4controlV member moved by distances which are functions of f the steampressure or other controlling jl quantity communicates its movement togai series of weights each of which is con motor, a control member, andgearing driven by'4 said motor and causing the control member to followthe movement of the plunger. j

`-l( Apparatus for controlling boilers and furnaces comprising a maincontrol member `moved byydistances which are functions ofV thel steampressure or other controlling quantity, a supply control device, aplural` i ity lof secondary control members adapted I' i to besuccessivelyactuated by the malin control member, separate mechanicalconnec-fV tions between said secondarycontrol mem- I bers `and saidsupply control device, and means for varying the effective length ofsaid vmechanical connections.

gearing for rotating said plunger from said In testimony whereof I allixmy signature.

CECIL WHEATLEY STANOLIFFE.

control means without affecting Vthe move-vV ment of the supply controldevice for other i moved by distances which are functions of thesteamvpressure or other `controlling 'quantity, a plurality ofVseconda-ry control AcwA means each operatively connected to the maincontrol member, means for connecting `by mechanical means each secondarycontrol means to a supply control device, andadjustable means wherebythe `movement lgiven to any one supply control device for any throughoutits range oflinovementmay Vbe steps of the movement of thevcontrolfmeans.V i 6. Apparatus forrcontrollingvboilers and @furnacescomprising a I nain control member l t varied without affecting themovement given V Y toany other supply control device. y .t

7. Apparatus for controlling boiler furiiso y

